1156430263 has 4 divisors (see below), whose sum is σ = 1157882040. Its totient is φ = 1154978488.

The previous prime is 1156430207. The next prime is 1156430279. The reversal of 1156430263 is 3620346511.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1156430263 - 2⁹ = 1156429751 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1156400263) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 724693 + ... + 726286.

It is an arithmetic number, because the mean of its divisors is an integer number (289470510).

Almost surely, 2^1156430263 is an apocalyptic number.

1156430263 is a deficient number, since it is larger than the sum of its proper divisors (1451777).

1156430263 is an equidigital number, since it uses as much as digits as its factorization.

1156430263 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1451776.

The product of its (nonzero) digits is 12960, while the sum is 31.

The square root of 1156430263 is about 34006.3268084043. The cubic root of 1156430263 is about 1049.6386551024.

Adding to 1156430263 its reverse (3620346511), we get a palindrome (4776776774).

The spelling of 1156430263 in words is "one billion, one hundred fifty-six million, four hundred thirty thousand, two hundred sixty-three".